And it goes on to discuss how his long-suffering mum was more horrified by his scruffy hair than his famous debauchery, and that he almost died when he once tried to ride a stallion.

But it reveals a quieter side to the 73-year-old star too – apparently explaining how he’d party hard after a gig, but beforehand would sit quietly drinking eight pints of water because he’d lose 10 pints dancing on stage.

A publisher says he has a copy of the manuscript and has begged the music legend to tell him whether it’s genuine or not, but the star has reportedly so far refused to confirm or deny he wrote it.

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The autobiography reveals Jagger used to drink 8 pints of water before a gig as he would lose so much of it on stage

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A publisher claims he has a copy of the manuscript but cannot get Mick to confirm or deny whether he wrote it

The 75,000-word document is said to have been written in the 1980s and came into publisher John Blake’s possession three years ago.

Mr Blake, who was the first editor of The Sun’s Bizarre column, told The Spectator: “Mick tells of buying a historic mansion, Stargroves, while high on acid and of trying out the life of horse-riding country squire.

“Having never ridden a horse before, he leapt on to a stallion, whereupon it reared and roared off ‘like a Ferrari’.

“He gave the stallion a thump on the forehead right between the eyes and slowed it down – otherwise the Stones’ story might have ended differently.”

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It also claims he bought his country mansion while high on LSDHe added: “It is an extraordinary insight into the one of the most influential rock stars of all time – but the sad thing is, the public will probably never see it.”

But the Daily Telegraph reported that Mick’s spokesman said Mr Blake has not been in touch with the singer and was unable to verify any specific incidents.